Lathe.



No. 645,313. Patented Mar. l3,' I900.

' J. F. DUWDING.

L AT H E.

(Application filed Nov. 6, 1899.)

5 She etsSheet I.

(No Model.)

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No. 645,3l3. Patented Mar. l3, I900. J. F D'DWDING.

L AT H E.

(Application filed Nov. 6, 1899.\

5 Sheets-Sheet 2.

(No Model.)

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No. 645,313. Patented Mar. l3, I900. J. F. DOWDING.

LATHE.

(Appiicaxion filed Nov. 6, 1899. (No Modal.) 5 Sheets-Sheet 3.

No. 645,3l3 -Patented Mar. [3, I900.

J. F. DDWDING.

LATHE.

(A plication filed Nov. 6, 1899.) (No Model.) 5 Sheets-Sheet 4.

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L AT H E (Application filed Nov. 6, 1899.)

5 Sheets-Sheet 5.

(No Model.)

UNITED STATES ATENT FFIGE.

JAMES F. DO\VDING, OF LONDON, ENOLAND, ASSIGNOR OF ONE-HALF TO HARRY ORME MASOALL, OF SAME PLACE.

LATHE.

SPECIFICATION forming part of Letters Patent No. 645,313 dated March 13, 1900.

Application filed November 6, 1899. Serial No. 736,040. (No model.)

To all whom it may concern:

Be it known that I, JAMES FRANCIS Down- ING, a subject of the Queen of Great Britain, residing at Wood Green,London,in the county of Middlesex, England, have invented an Improved Lathe, of which the following is a full, clear, and exact description, and for which I have made application for British patent,

dated the 9th day of March, 1899, in respect of which application no patent has yet been granted.

The invention relates to a lathe having two or more spindles, a tool-bar capable of being revolved on its own axis and of being used in line with the spindles or across the bed of the lathe, and a puppet.

The invention is illustrated in the accompanying drawings, in which- Figure 1 is an elevation, parts being broken away to admit the drawings to be made to as large a scale as possible. Fig. 2 is an elevation of a modification, showing how the gearcase and auxiliary spindles may be made removable. Fig. 3 is a plan of the head-stock when it is made as a fixture. Fig. 4 is a plan of the gear-case and spindles, partly in section when they are made removable. Fig. 5 is a face view of the puppet-head and table, partly in section,part being broken away. Fig. 6 is a plan of one spindle, some work, and the tool-bar parallel therewith. Fig. 7 is a plan of three pieces of work and a modified form of tool-bar placed across the machine. Fig. 8 is a section showing a ratchet adjustment and pawl which determines the position of the tools. Fig. 9 is aplan of the puppet-head, partly in section.

a is the main spindle or mandrel of the lathe receiving motion from the cone-pulley b.

c c are the auxiliary spindles, which receive their motion by means of a toothed wheel a, fitted to the main spindle a, idler-pinions (1, and pinions o c, fitted to said auxiliary spindles 0. Suitable chuck-screws d are fitted to the ends of the main and auxiliary spindles a and c c. The said spindles may be fitted in suitable bearings in the head-stock, as shown in Figs. 1 and .3, or in a detachable frame A, as shown in Fig. 2, and in which latter case the frame A may be attached to the bed A of the lathe as required. In this case the central spindle of the attachment would be fitted to the ordinary lathe-spindle a The frame A has a foot A and is secured to the bed of the lathe by means of bolts A and nuts A It'is placed in close proximity to the spindle a of a single spindle-lathe, and the central spindle of the attachment is screwed onto the spindle a after which the bolts A and nuts A are tightened up.

The tool-bar consists of a bar of metal e, re-

duced in diameter at its ends and having machined holes 6 to receive tools f. It is capable of being revolved in one direction by spring-pawl e which take the thrust and determine the position of the tools f.

The frame g by which the tool-bar e and bearings e are carried may be bolted by the bolt 9' to the slide-rest 11 by any of the ordinary methods.

The tool-bar frame 9 is capable of being fixed parallel with the spindles, as shown in Fig. 6, so that a number of tools f therein can be used on a single piece or one. number of pieces of work'h, carried by a single spindle 0. By loosening the bolt g the frame 9 may be turned across the bed of the lathe, so that tools f may act on pieces of work h, carried by the three spindles a c c, in which case toolcarriers f are fixed in the holes e, as shown in Figs. 1 and 7.

It is obvious that the tool-bar may be turned at any other angle when it is found necessary for any particular work. I

The tool-bar 6 (shown in Fig. 6) carries ten cutters which are not at a convenient distance apart to be used when the bar is placed across the machine, as shown in Fig. 7. It will be understood that the number of holes in the bar 6 may be Varied, or some only may be fitted with tools to suit different classes of work. Apart from the number of holes, the tool-bars eand e are of similar construction.

The bearings e consist of brasses held in position by nuts e A set-screw 6 passes through each of the top brasses to hold the tool-bar e firmly in addition to the ratchet e and spring-pawl e", which take the thrust.

The puppet-head consists of two plates or standards 3', fixed to a base-plate j, sliding in suitable guides in the bed of the lathe and retained in any desired position by means of Wedgesj and bolts or screws 7' provided with handle-gripsj The puppet-head containsa number of spindles 70, corresponding with the number of chuck-spindles. These spindles 7c are carried in bearings 70 in the plates or standards j and are provided with collars k and springs 70 which latter bear against the rear plate. These springs 70 tend to force the spindles it forward against the work, and thus compensate for slight variations in the lengths of the various pieces of work, after which the spindles are fixed in position by means of rings 70 screwed onto the conicallyscrewed split ends of the forward bearings 7c. The puppet-head is brought into the required position by means of the rack Z, pinion I, and handle F, as is well understood.

The standards j are formed with slots 7' to receive the bearings 7c and permit of their correct adjustment with the spindles a and c, after which such bearings are secured firmly in position by means of clamping-barsj and screws 3'.

What I claim as my invention, and desire to secure by Letters Patent, is

1. In a lathe, the combination of a central driving-spindle, a toothed wheel fixed thereon, idler-pinions, auxiliary spindles having toothed wheels receiving motion from the idler-pinions, a tool-bar, a pivoted frame carrying said tool-bar and mounted on the bed of the lathe capable of being used in line with the bed of the frame or at right or other angles thereto, substantially as shown and described.

2. In a lathe, the combination of a central driving-spindle, auxiliary spindles, toothed wheels on said spindles, and idler-wheels for conveying motion from the main to the auxiliary spindles, with a tool-bar mounted in bearings, a thrust-ratchet fixed on said toolbar, a pivoted frame carrying said bearings, and set-screws to hold the toolbar, substantially as shown and described.

8. In a lathe, the combination of a central driving-spindle, auxiliary spindles, toothed wheels on said spindles, and idler-wheels for conveying motion from the mainto the auxiliary spindles, a rotatable tool-bar, a frame carrying said tool-bar and pivoted to the bed of the machine,and a puppet-head having a number of spring-spindles corresponding to the number of chuck-spindles, substantially as set forth.

4. In a lathe, the combination of a central driving-spindle, auxiliary spindles, toothed gearing for communicating motion from the main to the auxiliary spindles, a horizontal rotating tool-bar carrying one or more rows of tools mounted in a pivoted frame, a puppet-head, a number of spring-spindles mount ed therein, a rack attached to said puppethead, a pinion engaging said rack for moving said puppet-head, and a number of set-screws to retain the same in position, substantially as set forth.

5. In a lathe, the combination of a central driving-spindle mounted in the head-stock, a toothed wheel on said spindle, a detachable frame, a number of auxiliary spindles mounted in said frame, toothed wheels on said auxiliary spindles, and idler-pinions carried by said frame to communicate motion from the driving-spindle to the auxiliary spindles, substantially as herein set forth.

In testimony whereof I aflix my signature in presence of two witnesses.

J. F. DOWVDING.

Witnesses: I

CLAUDE K. MILLs, WM. GIRLING. 

